mysql 授权 登录 重启 关闭

                        用户名密码登录
root@river-NUC8i7HNK:~# mysql -u root -p 
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 9
Server version: 5.7.26 MySQL Community Server (GPL)

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Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

mysql> 
mysql> 
mysql>    查看mysql用户名 和 权限
mysql> select host,user from mysql.user;
+-----------+---------------+
| host      | user          |
+-----------+---------------+
| %         | test1         |
| %         | zt_dev        |
| localhost | mysql.session |
| localhost | mysql.sys     |
| localhost | root          |
+-----------+---------------+
5 rows in set (0.00 sec)
       查看mysql端口号
mysql> show global variables like 'port';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| port          | 3306  |
+---------------+-------+
1 row in set (0.00 sec)

       查看当前用户的权限
mysql> show grants;
+---------------------------------------------------------------+
| Grants for zt_dev@%                                           |
+---------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'zt_dev'@'%' WITH GRANT OPTION |
+---------------------------------------------------------------+
1 row in set (0.00 sec)
      退出当前用户
mysql> exit;
Bye

       增加一个用户(zt_dev)密码为1234 并 授权(zt_dev)用户拥有当前数据库的所有权限
mysql> grant all privileges on *.* to zt_dev@'%' identified by '1234' with grant option;
Query OK, 0 rows affected, 1 warning (0.00 sec)
       刷新数据库  授权才会起作用
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

       增加一个test1用户，密码为123456，可以在任何主机上登录，并授权test1拥有当前数据库的查询，增加，修改和删除的权限。需要在mysql的root用户下进行
mysql> grant select,insert,update,delete on student.* to test1@”%”  identified by “123456″;
Query OK, 0 rows affected, 1 warning (0.00 sec)
       刷新数据库  授权才会起作用
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

       增加一个test2用户，密码为123456789，只能在192.168.2.12上登录，并授权test2拥有当前数据库的查询，增加，修改和删除的权限。需要在mysql的root用户下进行
mysql> grant select,insert,update,delete on student.* to test2@192.168.2.12 identified by “123456789″;
Query OK, 0 rows affected, 1 warning (0.00 sec)
       刷新数据库  授权才会起作用
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

%              可以在任何主机登录
192.168.3.111  只能在此主机上登录
localhost      只能在本地登录

                    使用 service 关闭：service mysql stop
[root@localhost ~]# service mysql stop
Redirecting to /bin/systemctl stop mysql.service
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# ps -ef|grep mysql
root      5714  5695  0 15:55 pts/1    00:00:00 mysql -u root -p
root     16852  5695  0 19:56 pts/1    00:00:00 grep --color=auto mysql
[root@localhost ~]# 
[root@localhost ~]# 
                    使用 service 启动：service mysql start
[root@localhost ~]# service mysql start
Redirecting to /bin/systemctl start mysql.service
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# ps -ef|grep mysql
root      5714  5695  0 15:55 pts/1    00:00:00 mysql -u root -p
mysql    16888     1  0 19:56 ?        00:00:00 /bin/sh /usr/bin/mysqld_safe --basedir=/usr
mysql    17054 16888  2 19:56 ?        00:00:00 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/log/mysqld.log --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/lib/mysql/mysql.sock
root     17082  5695  0 19:57 pts/1    00:00:00 grep --color=auto mysql
             
                  使用 service 重启：service mysql restart

[root@localhost ~]# service mysql restart
Redirecting to /bin/systemctl restart mysql.service

linux下开启 关闭 重启 mysql

　　使用 service 启动：service mysql start

　　使用 service 关闭：service mysql stop

　　使用 service 重启：service mysql restart

Linux下 MySQL通过source命令执行sql文件(数据库表结构和数据)

　　spurce + .sql文件路径(可百度看详细)